1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
From a381e9d12fb3bb489f12e119c3ae6e2318f429e9 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Wed, 20 Jul 2022 18:47:15 +0200
Subject: [PATCH 2/2] musl sandbox
---
.../syscall_parameters_restrictions.cc | 22 +++++--------------
.../linux/seccomp-bpf-helpers/syscall_sets.cc | 5 +++--
.../policy/linux/bpf_renderer_policy_linux.cc | 4 ++--
3 files changed, 11 insertions(+), 20 deletions(-)
diff --git a/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc b/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
index 6ae09fb10..57559ee6e 100644
--- a/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+++ b/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
@@ -127,21 +127,11 @@ namespace sandbox {
// present (as in newer versions of posix_spawn).
ResultExpr RestrictCloneToThreadsAndEPERMFork() {
const Arg<unsigned long> flags(0);
-
- // TODO(mdempsky): Extend DSL to support (flags & ~mask1) == mask2.
- const uint64_t kAndroidCloneMask = CLONE_VM | CLONE_FS | CLONE_FILES |
- CLONE_SIGHAND | CLONE_THREAD |
- CLONE_SYSVSEM;
- const uint64_t kObsoleteAndroidCloneMask = kAndroidCloneMask | CLONE_DETACHED;
-
- const uint64_t kGlibcPthreadFlags =
- CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | CLONE_THREAD |
- CLONE_SYSVSEM | CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID;
- const BoolExpr glibc_test = flags == kGlibcPthreadFlags;
-
- const BoolExpr android_test =
- AnyOf(flags == kAndroidCloneMask, flags == kObsoleteAndroidCloneMask,
- flags == kGlibcPthreadFlags);
+ const int required = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
+ CLONE_THREAD | CLONE_SYSVSEM;
+ const int safe = CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID |
+ CLONE_DETACHED;
+ const BoolExpr thread_clone_ok = (flags&~safe)==required;
// The following two flags are the two important flags in any vfork-emulating
// clone call. EPERM any clone call that contains both of them.
@@ -151,7 +141,7 @@ ResultExpr RestrictCloneToThreadsAndEPERMFork() {
AnyOf((flags & (CLONE_VM | CLONE_THREAD)) == 0,
(flags & kImportantCloneVforkFlags) == kImportantCloneVforkFlags);
- return If(IsAndroid() ? android_test : glibc_test, Allow())
+ return If(thread_clone_ok, Allow())
.ElseIf(is_fork_or_clone_vfork, Error(EPERM))
.Else(CrashSIGSYSClone());
}
diff --git a/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc b/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
index d1ea8e99a..cb1ff3042 100644
--- a/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
+++ b/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
@@ -399,6 +399,7 @@ bool SyscallSets::IsAllowedProcessStartOrDeath(int sysno) {
#if defined(__i386__)
case __NR_waitpid:
#endif
+ case __NR_set_tid_address:
return true;
case __NR_clone: // Should be parameter-restricted.
case __NR_setns: // Privileged.
@@ -411,7 +412,6 @@ bool SyscallSets::IsAllowedProcessStartOrDeath(int sysno) {
#if defined(__i386__) || defined(__x86_64__) || defined(__mips__)
case __NR_set_thread_area:
#endif
- case __NR_set_tid_address:
case __NR_unshare:
#if !defined(__mips__) && !defined(__aarch64__)
case __NR_vfork:
@@ -521,6 +521,8 @@ bool SyscallSets::IsAllowedAddressSpaceAccess(int sysno) {
case __NR_mlock:
case __NR_munlock:
case __NR_munmap:
+ case __NR_mremap:
+ case __NR_membarrier:
return true;
case __NR_madvise:
case __NR_mincore:
@@ -538,7 +540,6 @@ bool SyscallSets::IsAllowedAddressSpaceAccess(int sysno) {
case __NR_modify_ldt:
#endif
case __NR_mprotect:
- case __NR_mremap:
case __NR_msync:
case __NR_munlockall:
case __NR_readahead:
diff --git a/src/3rdparty/chromium/sandbox/policy/linux/bpf_renderer_policy_linux.cc b/src/3rdparty/chromium/sandbox/policy/linux/bpf_renderer_policy_linux.cc
index 9fe9575eb..fa1a946f6 100644
--- a/src/3rdparty/chromium/sandbox/policy/linux/bpf_renderer_policy_linux.cc
+++ b/src/3rdparty/chromium/sandbox/policy/linux/bpf_renderer_policy_linux.cc
@@ -93,11 +93,11 @@ ResultExpr RendererProcessPolicy::EvaluateSyscall(int sysno) const {
case __NR_sysinfo:
case __NR_times:
case __NR_uname:
- return Allow();
- case __NR_sched_getaffinity:
case __NR_sched_getparam:
case __NR_sched_getscheduler:
case __NR_sched_setscheduler:
+ return Allow();
+ case __NR_sched_getaffinity:
return RestrictSchedTarget(GetPolicyPid(), sysno);
case __NR_prlimit64:
// See crbug.com/662450 and setrlimit comment above.
--
2.35.1
|
GitWeb